Most countries have laws about age limits under which the consumers are not allowed to view certain content (i.e. adult industry) or use certain features or services (i.e. gambling).
ID document check is commonly used at entrance in bars, while web sites usually either use simple questionnaires or require the end user to enter her credit card number as proof of her legal age.
None of these methods is either reliable or popular. By using Identyum digital identity platform, a company can simply verify the end user’s age, either by direct integration, scanning QR code on the website or using NFC with mobile phone to trigger age verification. End user is always in the center of data sharing and she has to give her explicit consent that data about her being 18+ will be shared, and whom with. She can also rest assured that NO other personal data (other than her being 18+) will be shared.